New @life eh? We've done this before, in in the late 80s with the mujahedeen. It didn't work out too well. Many of the veterans of that proxy war with Russia went on to become the leaders of the Taliban.

They are jihadists and Muslims in general do not play well with anyone else. How is it a bad thing for the enemies of my enemies to kill each other? Sunnis want to kill Shiites and vice versa and both want to conquer the rest of the world so I'm happy to help as many as possible of both to achieve martyrdom.